A083937 A014486-encodings of the plane binary trees and plane general trees whose left(most) subtree is just a "stick": \.
2, 10, 42, 44, 170, 172, 178, 180, 184, 682, 684, 690, 692, 696, 714, 716, 722, 724, 728, 738, 740, 744, 752, 2730, 2732, 2738, 2740, 2744, 2762, 2764, 2770, 2772, 2776, 2786, 2788, 2792, 2800, 2858, 2860, 2866, 2868, 2872, 2890, 2892, 2898, 2900, 2904, 2914
Offset: 0